Laguna XS.2 vs Claude Fable 5
Claude Fable 5 comes out ahead, 72 to 36 on our weighted score, and it is the cheaper option too.
PoolsideLaguna XS.2
36/100- ECI—
- Price—
- Context262K
- Our pick
AnthropicClaude Fable 5
72/100- ECI162.2
- Price$10.00 / $50.00
- Context1M
Add a model
Make it a three-way comparison.
Claude Fable 5 is our pick
Claude Fable 5 is the better all-round choice, scoring 72/100 against Laguna XS.2 (36). It leads on inputs & features and context window. The score weighs inputs & features 60%, context window 40%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
- CapabilityNot enough dataNo independent benchmark covers every model here yet
- Lowest priceClaude Fable 5Claude Fable 5 $20.00 per 1M tokens (3:1 blend) · Laguna XS.2 unpriced
- Longest contextClaude Fable 5Claude Fable 5 1,000,000 · Laguna XS.2 262,144 tokens
- Widest inputsClaude Fable 5Laguna XS.2: Text · Claude Fable 5: Text, Images, PDFs
- Self-hostingLaguna XS.2Publishes downloadable weights
| Measure | Weight | Laguna XS.2 | Claude Fable 5 |
|---|---|---|---|
| Inputs & features | 60% | 35 | 80 |
| Context window | 40% | 37 | 60 |
| Overall | 100% | 36/100 | 72/100 |
Left out because at least one model lacks the data: capability and price. The remaining weights were rescaled.
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | Laguna XS.2Poolside | Claude Fable 5Anthropic |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | 162.2 |
| ECI rank | — | #7 of 148 |
| GPQA DiamondGraduate-level science questions | — | 85.9% |
| FrontierMath Tiers 1–3Research-level mathematics | — | 87.0% |
| OTIS Mock AIME 2024–2025Competition mathematics | — | 100% |
| SimpleQA VerifiedShort factual questions | — | 70.7% |
| Price per million tokens | ||
| Input | — | $10.00 |
| Output | — | $50.00 |
| Cached input | — | $1.00 |
| Blended (3:1) | — | $20.00 |
| Long-context rate | — | Same rate |
| Price source | — | Official Anthropic API |
| Limits | ||
| Context window | 262,144 tokens | 1,000,000 tokens (best) |
| Max output | 32,768 tokens | 128,000 tokens (best) |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | No | Yes |
| PDFs | No | Yes |
| Audio | No | No |
| Video | No | No |
| Reasoning | Yes | Yeslow · medium · high · xhigh · max |
| Tool calling | Yes | Yes |
| Structured output | No | Yes |
| Availability | ||
| Weights | Open | Proprietary |
| API model ID | — | claude-fable-5 |
| API providers | 1 | 38 (best) |
| Released | Apr 28, 2026 | Jun 9, 2026 |
| Knowledge cutoff | — | Jan 31, 2026 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Laguna XS.2—
- Claude Fable 5$200.00
Which should you choose?
Which is better: Laguna XS.2 or Claude Fable 5?
Claude Fable 5 is the better all-round choice, scoring 72/100 against Laguna XS.2 (36). It leads on inputs & features and context window. The score weighs inputs & features 60%, context window 40%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
Which is cheaper, Laguna XS.2 or Claude Fable 5?
Claude Fable 5 is cheaper at $10.00 input / $50.00 output per million tokens (official Anthropic API price). . At a typical mix of three input tokens to one output token, that is $20.00 per million tokens for Claude Fable 5 versus . Laguna XS.2 has no published per-token price.
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Laguna XS.2 has not been scored yet and Claude Fable 5 has an ECI of 162.2.
Which is better for coding?
There are no published SWE-bench Verified results for Laguna XS.2 and Claude Fable 5 yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Both support tool calling for agent workflows.
Which has the bigger context window?
Claude Fable 5 has the largest context window at 1,000,000 tokens, against 262,144 for Laguna XS.2. Maximum output per response: Laguna XS.2 up to 32,768, Claude Fable 5 up to 128,000 tokens.
Which can read images, PDFs, audio or video?
Laguna XS.2 accepts text; Claude Fable 5 accepts text, images and PDFs. Claude Fable 5 handles the widest range of inputs.
Are any of these open source?
Laguna XS.2 publishes its weights and can be self-hosted; Claude Fable 5 is proprietary.
Which is newer?
Claude Fable 5 is the newest, released Jun 9, 2026. Laguna XS.2 came out Apr 28, 2026. Knowledge cutoff: Claude Fable 5 Jan 31, 2026.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.
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